Re: Unable to find schema.xml in zookeeper.

I ran into this same error but nothing related to adding data or running jobs against Solr. It either couldn't start or CM kept failing to access the web server and api for its health check.

I didn't dig into it as it was a new cluster that was recently Kerberized and nothing was in Solr. I got it fixed by shutting down Solr and running the 'Initialize Solr' command in the Solr Service action menu in CM.